Add JERRY_FEATURE_DEBUGGER to API docs (#1768)
Add JERRY_FEATURE_DEBUGGER to API docs (#1768)

In #1738, `JERRY_FEATURE_DEBUGGER` was added to the sources, but
the docs were not updated.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu
bsdelf/jerryscript,glistening/jerryscript,yichoi/jerryscript,grgustaf/jerryscript,grgustaf/jerryscript,gabrielschulhof/jerryscript,glistening/jerryscript,jerryscript-project/jerryscript,jerryscript-project/jerryscript,martijnthe/jerryscript,bzsolt/jerryscript,zherczeg/jerryscript,glistening/jerryscript,robertsipka/jerryscript,bsdelf/jerryscript,dbatyai/jerryscript,robertsipka/jerryscript,grgustaf/jerryscript,grgustaf/jerryscript,bsdelf/jerryscript,jack60504/jerryscript,bzsolt/jerryscript,zherczeg/jerryscript,glistening/jerryscript,glistening/jerryscript,akosthekiss/jerryscript,akosthekiss/jerryscript,bzsolt/jerryscript,akosthekiss/jerryscript,jerryscript-project/jerryscript,martijnthe/jerryscript,jack60504/jerryscript,LaszloLango/jerryscript,gabrielschulhof/jerryscript,bzsolt/jerryscript,robertsipka/jerryscript,jack60504/jerryscript,LaszloLango/jerryscript,martijnthe/jerryscript,martijnthe/jerryscript,bsdelf/jerryscript,bzsolt/jerryscript,robertsipka/jerryscript,jack60504/jerryscript,robertsipka/jerryscript,jack60504/jerryscript,zherczeg/jerryscript,jack60504/jerryscript,yichoi/jerryscript,dbatyai/jerryscript,LaszloLango/jerryscript,grgustaf/jerryscript,glistening/jerryscript,martijnthe/jerryscript,akosthekiss/jerryscript,martijnthe/jerryscript,gabrielschulhof/jerryscript,dbatyai/jerryscript,robertsipka/jerryscript,dbatyai/jerryscript,bsdelf/jerryscript,jerryscript-project/jerryscript,akosthekiss/jerryscript,yichoi/jerryscript,LaszloLango/jerryscript,bsdelf/jerryscript,zherczeg/jerryscript,jerryscript-project/jerryscript,grgustaf/jerryscript,yichoi/jerryscript,yichoi/jerryscript,LaszloLango/jerryscript,dbatyai/jerryscript,zherczeg/jerryscript,gabrielschulhof/jerryscript,gabrielschulhof/jerryscript